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StringDtype(storage=None)
Extension dtype for string data.
Warning: StringDtype is considered experimental. The implementation and parts of the API may change without warning. Parameter Name Descriptionstorage
{"python", "pyarrow", "pyarrow_numpy"}, optional .. attribute:: None :noindex: .. method:: None :noindex: .. rubric:: Examples >>> pd.StringDtype() string[python] >>> pd.StringDtype(storage="pyarrow") string[pyarrow]
If not given, the value of pd.options.mode.string_storage
.
Default NA value to use for this type.
This is used in e.g. ExtensionArray.take. This should be the user-facing "boxed" version of the NA value, not the physical NA value for storage. e.g. for JSONArray, this is an empty dictionary.
typeThe scalar type for the array, e.g. int
It's expected ExtensionArray[item]
returns an instance of ExtensionDtype.type
for scalar item
, assuming that value is valid (not NA). NA values do not need to be instances of type
.
__from_arrow__(array: pyarrow.Array | pyarrow.ChunkedArray) -> BaseStringArray
Construct StringArray from pyarrow Array/ChunkedArray.
construct_array_typeconstruct_array_type() -> type_t[BaseStringArray]
Return the array type associated with this dtype.
construct_from_stringconstruct_from_string(string) -> Self
Construct a StringDtype from a string.
Parameter Name Descriptionstring
str
The type of the name. The storage type will be taking from string
. Valid options and their storage types are ========================== ============================================== string result storage ========================== ============================================== 'string'
pd.options.mode.string_storage, default python 'string[python]'
python 'string[pyarrow]'
pyarrow ========================== ==============================================
TypeError
If the string is not a valid option.
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Last updated 2025-08-12 UTC.
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